Adding VoIP dial format automatically in freepbx

I need to configure trunk and outbound routes to use a dial format premium in my VoIP provider when I make the call. For example, 0102 + number is premium, 0101+number is for standard.
if I need to call UK and from the phone you dial 44567889034 at the level of provider I need to use for example the premium route. How freepbx can automatically the dial prefix without need to dial on the phone. My VoIP provider with his system need to receive the number 010244567889034 .
How to configure this in asterisk using freepbx

Take a look at the outbound routes. In there you can manipulate the digits.